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lim x → 3 ( 1 x − 3 − 3 x 2 − 3 x ) - Mathematics

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Question

\[\lim_{x \to 3} \left( \frac{1}{x - 3} - \frac{3}{x^2 - 3x} \right)\] 

Solution

\[\lim_{x \to 3} \left[ \frac{1}{x - 3} - \frac{3}{x^2 - 3x} \right]\]
\[ = \lim_{x \to 3} \left[ \frac{1}{x - 3} - \frac{3}{x\left( x - 3 \right)} \right]\]
\[ = \lim_{x \to 3} \left[ \frac{x - 3}{x\left( x - 3 \right)} \right]\]
\[ = \lim_{x \to 3} \left[ \frac{1}{x} \right]\]
\[ = \frac{1}{3}\]

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Chapter 29: Limits - Exercise 29.3 [Page 23]

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RD Sharma Mathematics [English] Class 11
Chapter 29 Limits
Exercise 29.3 | Q 22 | Page 23

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